Fix data source out of order causing load metadata not right problem. #7652

Job	Run time
Import Global Environment / init-environment	6s
Import Global Environment / init-environment	6s
E2E - Agent with MySQL (proxy, tracing, jaeger)	8m 9s
E2E - Agent with MySQL (proxy, tracing, jaeger)	8m 9s
E2E - Agent with MySQL (proxy, tracing, zipkin)	5m 59s
E2E - Agent with MySQL (proxy, tracing, zipkin)	5m 59s
E2E - Agent with MySQL (proxy, metrics, prometheus)	7m 15s
E2E - Agent with MySQL (proxy, metrics, prometheus)	6m 23s
E2E - Agent with MySQL (proxy, logging, file)	5m 53s
E2E - Agent with MySQL (proxy, logging, file)	5m 53s
E2E - Agent with MySQL (jdbc, logging, file)	5m 45s
E2E - Agent with MySQL (jdbc, logging, file)	5m 45s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	7m 14s
E2E - Agent with MySQL (jdbc, metrics, prometheus)	7m 14s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	10m 15s
E2E - Agent with MySQL (jdbc, tracing, jaeger)	10m 15s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	8m 30s
E2E - Agent with MySQL (jdbc, tracing, zipkin)	8m 30s
	1h 57m 20s

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